主要代码
# 删除控件树子节点/根节点
def deleteItem(self):
try:
# 尝试删除子节点(通过其父节点，调用removeChild函数进行删除)
currNode = self.tree.currentItem()
parent1 = currNode.parent()
parent1.removeChild(currNode)
except Exception:
# 遇到异常时删除根节点
try:
rootIndex = self.tree.indexOfTopLevelItem(currNode)
self.tree.takeTopLevelItem(rootIndex)
except Exception:
print(Exception)
完整程序代码
from PyQt5 import QtCore
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
import sys
class CollectionWindow(QMainWindow):
def __init__(self, parent=None):
QWidget.__init__(self, parent)
# 设置窗口标题和大小
self.setWindowTitle('树控件')
self.resize(380, 360)
# 添加收藏夹，根节点的父是 QTreeWidget对象
self.tree = QTreeWidget()
self.tree.setColumnCount(1)
self.tree.setHeaderLabels(['收藏夹']) # 是表，则有表头
self.tree.clicked.connect(self.onClicked)
self.f_item = self.tree.headerItem()
# 添加一个初始文件夹
child = QTreeWidgetItem(self.tree)
child.setText(0, '目录/跟节点')
child.setFlags(QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsEditable)
# 以下是窗口的设置
self.setCentralWidget(self.tree)
addAction = QAction("添加新子节点", self)
addAction.triggered.connect(self.addItem)
addAction2 = QAction("添加新目录/根节点", self)
addAction2.triggered.connect(self.addFolder)
deleteAction = QAction("删除", self)
deleteAction.triggered.connect(self.deleteItem)
toolbar = self.addToolBar("")
toolbar.addAction(addAction)
toolbar.addAction(addAction2)
toolbar.addAction(deleteAction)
self.show()
# 添加树控件子节点
def addItem(self):
currNode = self.tree.currentItem()
addChild = QTreeWidgetItem()
addChild.setText(0, "新子节点")
currNode.addChild(addChild)
# 添加根节点
def addFolder(self):
child = QTreeWidgetItem(self.tree)
child.setText(0, '新目录/根节点')
child.setFlags(QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsEditable)
# 删除控件树子节点/根节点
def deleteItem(self):
try:
# 尝试删除子节点(通过其父节点，调用removeChild函数进行删除)
currNode = self.tree.currentItem()
parent1 = currNode.parent()
parent1.removeChild(currNode)
except Exception:
# 遇到异常时删除根节点
try:
rootIndex = self.tree.indexOfTopLevelItem(currNode)
self.tree.takeTopLevelItem(rootIndex)
except Exception:
print(Exception)
def onClicked(self):
# 将之前选中的子项目背景色还原
self.f_item.setBackground(0, QColor(255, 255, 255))
# 获取当前选中项
item = self.tree.currentItem()
# 设置当前选择项背景
item.setBackground(0, QColor('#AFEEEE'))
# 更新前选中项
self.f_item = item
if __name__ == '__main__':
app = QApplication(sys.argv)
window = CollectionWindow()
window.show()
sys.exit(app.exec_())
运行效果
参考
pyqt QTreeWidget关于Root项和相应子项的一些操作
